The iron in the fertilizer is what causes rust.
Iron fertilizer stains on concrete.
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Many consumer fertilizers today contain a small percentage of iron a mineral your lawn needs to stay healthy but which your concrete certainly doesn t.
This may sound weird but fertilizer really can leave rust stains on your pristine concrete.
Super easy to use does not have a strong odor or harm your hands it s sealgreen.
I found a product that cleans fertilizer stains from concrete.
You can use concrete rust stain removers that are readily available at home improvement centers.
Singerman concrete rust remover works extremely well at getting rid of rust stains on concrete including those caused by lawn fertilizer.
Not all fertilizers have iron but it does get your grass really green.
Iron fertilizers contain iron sulfate which can stain your walkway.
You might have known that.
These stains are caused by chemical fertilizer granules that are left on concrete surfaces.
Sometimes a fertilizer bag can cause a nasty stain when placed on a concrete walkway.
Fertilizer rust stains on concrete comprise some the most powerful and embedded tough rust stains to eliminate.
Water causes the chemical pellets to basically soften on the concrete and therefore the properties inside the chemical will cause deep rust.